Bug Description

Description of problem:
When installing Ubuntu 18.04 in a server, with early installation initialization, below failed messages are seen -
a. Timed out waiting for device dev-disk-by\x2duuid-00c629d6....
b. Dependency failed for /subiquity_config.

Please refer to attached screenshot.

OS image:
ubuntu-18.04-live-server-amd64

Steps to Reproduce:
1.Install and boot into os.
2.The issue can be seen in OS installation initialization.